Table 5.

Degree of agreement between disease activity states based on BASDAI and ASDAS-ESR cut-off values.

	ASDAS-ESR <1.3	1.3 ≤ASDAS-ESR <2.1	2.1 ≤ASDAS-ESR ≤3.5	ASDAS-ESR > 3.5
	n = 134	n = 184	n = 149	n = 22
BASDAI <2.0	113 (84.3)	64 (34.8)	14 (9.4)	0 (0.0)
2.0 ≤ BASDAI <2.6	13 (9.7)	51 (27.7)	12 (8.1)	0 (0.0)
2.6 ≤ BASDAI ≤ 4.8	8 (6.0)	67 (36.4)	87 (58.4)	5 (22.7)
BASDAI > 4.8	0 (0.0)	2 (1.1)	36 (24.2)	17 (77.3)

BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; ASDAS, Ankylosing Spondylitis Disease Activity Score; ESR, erythrocyte sedimentation rate.

Weighted kappa: 0.538, p < 0.001.